com.github.javaparser.symbolsolver.resolution.typeinference

Class Bound

java.lang.Object

com.github.javaparser.symbolsolver.resolution.typeinference.Bound

Direct Known Subclasses:

CapturesBound, FalseBound, SameAsBound, SubtypeOfBound, ThrowsBound

public abstract class Bound
extends Object

Bounds are defined for Inference Variables.

Author:

Federico Tomassetti

Constructor Summary

Constructors

Constructor and Description
Bound()

Method Summary

Modifier and Type	Method and Description
boolean	isADependency() Other bounds relate two inference variables, or an inference variable to a type that contains inference variables.
Optional<Instantiation>	isAnInstantiation() Given a bound of the form α = T or T = α, we say T is an instantiation of α.
Optional<ProperLowerBound>	isProperLowerBound() Given a bound of the form T <: α, we say T is a proper lower bound of α.
Optional<ProperUpperBound>	isProperUpperBound() Given a bound of the form α <: T, we say T is a proper upper bound of α.
abstract boolean	isSatisfied(InferenceVariableSubstitution inferenceVariableSubstitution) A bound is satisfied by an inference variable substitution if, after applying the substitution, the assertion is true.
abstract Set<InferenceVariable>	usedInferenceVariables()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Bound

public Bound()

Method Detail

isSatisfied

public abstract boolean isSatisfied(InferenceVariableSubstitution inferenceVariableSubstitution)

A bound is satisfied by an inference variable substitution if, after applying the substitution, the assertion is true.

isAnInstantiation

public Optional<Instantiation> isAnInstantiation()

Given a bound of the form α = T or T = α, we say T is an instantiation of α. Return empty if it is not an instantiation. Otherwise it returns the variable of which this is an instantiation.

isProperUpperBound

public Optional<ProperUpperBound> isProperUpperBound()

Given a bound of the form α <: T, we say T is a proper upper bound of α. Return empty if it is not a proper upper bound. Otherwise it returns the variable of which this is an proper upper bound.

isProperLowerBound

public Optional<ProperLowerBound> isProperLowerBound()

Given a bound of the form T <: α, we say T is a proper lower bound of α. Return empty if it is not a proper lower bound. Otherwise it returns the variable of which this is an proper lower bound.

isADependency

public boolean isADependency()

Other bounds relate two inference variables, or an inference variable to a type that contains inference variables. Such bounds, of the form S = T or S <: T, are called dependencies.

usedInferenceVariables

public abstract Set<InferenceVariable> usedInferenceVariables()